EP1211825B1 - Dispositif d'arret de sécurité configurable d'un amplificateur optique utilisant une mémoire non volatile - Google Patents

Dispositif d'arret de sécurité configurable d'un amplificateur optique utilisant une mémoire non volatile Download PDF

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Publication number
EP1211825B1
EP1211825B1 EP01125202A EP01125202A EP1211825B1 EP 1211825 B1 EP1211825 B1 EP 1211825B1 EP 01125202 A EP01125202 A EP 01125202A EP 01125202 A EP01125202 A EP 01125202A EP 1211825 B1 EP1211825 B1 EP 1211825B1
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EP
European Patent Office
Prior art keywords
optical amplifier
parameters
shutdown
input
volatile memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01125202A
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German (de)
English (en)
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EP1211825A3 (fr
EP1211825A2 (fr
Inventor
J. Michael Dugan
David Eugene Bath
Mike R. Moothart
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Alcatel USA Sourcing Inc
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Alcatel USA Sourcing Inc
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Publication of EP1211825A2 publication Critical patent/EP1211825A2/fr
Publication of EP1211825A3 publication Critical patent/EP1211825A3/fr
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Publication of EP1211825B1 publication Critical patent/EP1211825B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/073—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an out-of-service signal
    • H04B10/0731—Testing or characterisation of optical devices, e.g. amplifiers

Definitions

  • the present invention relates to fiber optic communications networks, and more particularly to a configurable safety shutdown for an optical amplifier using non-volatile storage for system configuration for reliably controlling a safety shutdown function in the event of a fiber optic transmission line disconnect or cut.
  • WDM wavelength-division multiplex
  • the distances between WDM optical equipment and the signal transmission rates may be attenuation and/or dispersion limited.
  • amplifiers are employed to boost signal strength to overcome these limitations due to losses from WDM devices, dispersion compensating fibers/gratings, connectors, splices, and fiber.
  • Optical power levels generated by fiber optic transmission systems can therefore be high enough to be hazardous to the human eye. If the transmission fiber is disconnected or accidentally cut or broken, the open end of the fiber can be emitting hazardous power, and this emission can possible be pointed into a person's eye. This power is higher when multiple optical channels are transmitted over a single fiber, as in WDM systems. Even higher power levels are generated when optical amplifiers are used.
  • Fiber optic transmission systems may employ a safety shutdown function which will shut down the optical output when the fiber is disconnected, cut, or broken.
  • a safety shutdown function which will shut down the optical output when the fiber is disconnected, cut, or broken.
  • Such existing safety shutdown systems are based on the detection of input loss of power, which is then used to shut down the optical output.
  • the operation of an optical amplifier is controlled by various parameters including, for example, shutdown, restart off period, restart on period, and loss of signal threshold. These parameters allow optical amplifiers within the optical transmission system to be configurable, depending upon the specific application and location within the system. Configuration and reconfiguration of such parameters within an optical amplifier may be accomplished by utilizing system software to configure logic gates within an optical amplifier module. However, due to the use of volatile software configurable logic gates, there exists the possibility that the gates may be accidentally reprogrammed to a configuration which makes the optic transmission system unsafe. Such undesirable changes may occur when a module is removed from the system and reinserted in a different location or plugged back into a same location. Furthermore, internal system software
  • the network may utilize configurable optical amplifiers such as, for example, erbium-doped fiber amplifiers (EDFAs) and other remote pumped EDFAs for boosting signal strength in WDM systems to ensure proper amplifier configuration.
  • EDFAs erbium-doped fiber amplifiers
  • other remote pumped EDFAs for boosting signal strength in WDM systems to ensure proper amplifier configuration.
  • a system for determining failures of an optical amplifier based on measuring the performance of the optical amplifier is known.
  • the measurements compare input signal power and the output signal power. Periodically or in request while in operation, for each wavelength the quantity of amplification is calculated, based on the measurement,.
  • the measurements are then stored in an non-volatile memory and it is determined, whether an error has occurred. All parameters are determined in the factory and are stored in the non-volatile memory.
  • a fiber-optic communication system comprising a shutdown apparatus, enabling to shut down an optical amplifier in the event of a fiber optic cable disruption.
  • a further optical carrier is provided which is detected even by optical amplifiers that are shut down and thus enables to restart an optical amplifier.
  • an optical amplifier is known, wherein a self-test means is applied to the optical amplifier.
  • the known system further comprises non-volatile memory for storing data derived from the self-tests. These data is then used to determine the reason, whether a failure has occurred.
  • a system for configuring the optical amplifier in a fiber optic communications network having an optical amplifier including a safety shutdown input, a system for configuring the optical amplifier is provided.
  • the system includes a non -volatile memory for storing optical amplifier parameters. Circuitry is provided for inputting amplifier parameters into the memory and for changing previously stored amplifier parameters. Configuration of the optical amplifier parameters cannot be changed until a hardware control input is actuated via manual intervention.
  • the system also provides for an indication of a mismatch between newly input parameters and previously stored optical amplifier parameters.
  • an optical fiber transmission communications network is illustrated, and is generally identified by the numeral 10.
  • Optical fiber transmission network 10 interconnects a site 12 to a site 14.
  • Each site 12 and 14 includes a group of transmitters 16 and a group of receivers 18.
  • Transmitters 16 of site 12 communicate with receivers 18 of site 14 via an optical fiber transmission line, generally identified by the numeral 20.
  • Transmitters 16 of site 14 communicate with receivers 18 of site 12 via an optical fiber transmission line, generally identified by the numeral 22.
  • network 10 has been illustrated utilizing two lines 20 and 22, the present invention can also be utilized in a bi-directional fiber transmission system.
  • Transmitters 16 located at sites 12 and 14 are similarly configured, and like numerals will be utilized for like and corresponding components.
  • receivers 18 located at sites 12 and 14 are similarly configured, and like numerals will be utilized for like and corresponding components of receivers 18.
  • Transmitters 16 and receivers 18 are part of external terminal equipment devices or other transmission systems. As used herein, terminal equipment will include equipment as well as additional networks.
  • Each transmitter input signal is applied to a transmit wavelength adapter (TWA) 30.
  • TWA 30 is a transponder module which is used as an input interface device for each data channel as data enters network 10. The transponder module performs a series of functions: it receives and detects the incoming transmitter signal, and it regenerates the input signal, and transmits the data signal with a modulator and a wavelength-stabilized single-mode CW laser.
  • each TWA 30 is an individual wavelength that is applied to a WDM multiplexer 32 which combines the multiple 1-N wavelength channels into a composite multi-wavelength (multi-channel) signal for transmission.
  • the output of multiplexer 32 is applied to an amplifier, such as, for example, an erbium doped fiber amplifier (EDFA) transmit optical fiber amplifier 34 whose output is applied to optical fiber transmission line 20.
  • EDFA erbium doped fiber amplifier
  • Transmit optical fiber amplifier 34 also includes a shutdown control 42.
  • Receiver 18 at site 14 includes a EDF amplifier 60.
  • a photodetector 62 is connected at the input of EDF amplifier 60. Detection of loss of input power by photodetector 62 actuates a shutdown-restart control 82 which includes shutdown logic and a fail-safe restart timer to actuate shutdown control 42 and thereby terminate operation of transmit optical fiber amplifier 34 in transmitter 16 of site 14. Additionally, after shutdown, shutdown-restart control 82 functions to turn the associated amplifier back on after the fiber has been repaired. Shutdown-restart control 82 operates to turn an amplifier on for a predetermined time period and then off for a predetermined time period. This on/off cycle is repeated until the fiber is repaired.
  • the on and off periods are configurable parameters of the amplifier as well as the shutdown provisioning and loss of signal threshold provisioning of the amplifier. These parameters are set by system software.
  • Receive wavelength adapter 68 includes a transponder module used as an output interface device for each data channel as data exits from the WDM system at site 14 via channels 1-N to terminal equipment receivers 18 at site 14.
  • RWA 68 uses a high performance receiver to detect and recover the received signal, monitors the quality of the received signal, monitors the signal trace code, and regenerates the optical signal for sending signals out of WDM network site 14 to terminal equipment receivers 18 at site 14.
  • An important aspect of the present invention is the use of the present shutdown-restart control 82 utilizing a non-volatile storage to store the configuration parameters that are provided by the system software.
  • the configuration is placed into a temporary location by the system software once the desired configuration has been entered via a system interface, and then the operator manually stores this configuration in the non-volatile memory via a switch.
  • the parameter configurations cannot be changed until the switch is operated again so that the shutdown operation is under hardware control thereby improving the reliability due to hardware circuitry.
  • Amplifier configuration parameters are input to shutdown-restart control 82 via an internal data bus.
  • Information is stored in input registers 90, 92, and 94 for such configurable parameters as the on and off periods of an optical amplifier and the loss of signal threshold.
  • Registers 90, 92, and 94 temporarily store these parameters.
  • These parameters are then stored in a non-volatile storage memory such as, for example, an electronically erasable, programmable read-only memory (EEPROM) 98.
  • EEPROM electronically erasable, programmable read-only memory
  • registers 90, 92, and 94 are transferred to EEPROM 98.
  • the configuration parameters stored in EEPROM 98 are input to the system and associated optical amplifier via output registers 104, 106, and 108.
  • Register 104 provides shutdown provisioning
  • register 106 provides restart off period
  • register 108 provides for restart on period and loss of signal threshold.
  • EEPROM 98 The output of EEPROM 98 is also applied to a register compare logic 110 which also receives as an input the output of registers 90, 92, and 94. Compare logic 110 compares the contents of register 90 to register 104, the contents of register 92 to register 106, and the contents of register 94 to register 108. In this manner, the operator is alerted as to whether any new configuration parameters which have been input into registers 90, 92, and 94 are different from the previously stored configuration parameters in EEPROM 98. Parameter mismatch is indicated by a visible indicator, such as, for example, illumination of a light emitting diode 112.
  • any inadvertent or accidental change in configuration parameters input via the internal data bus will be detected when compared to previously stored configuration parameters through the operation of compare logic 110, and a visual indication will be provided to the system operator that the system desires to change configuration parameters. If, in fact, the configuration parameters are to be changed, the system operator then actuates switch 100 to load new configuration parameters into EEPROM 98 for a new system configuration. Therefore, a positive action is required by the system operator to reconfigure the parameters of the shutdown-restart control 82 of an optical amplifier in network 10. The present system thereby confirms whether the same parameter configuration exists when a module is unplugged and replugged back into the system, or when a module is replaced by a new module.
  • the present invention provides for a reliable control for a safety shutdown of an optical amplifier of a fiber optic communications network in which configuration parameters are reliably set and which require a hardware action for reset.

Claims (5)

  1. Système pour configurer un amplificateur optique (34) muni d'une entrée d'arrêt de sécurité, ledit système comprenant :
    - une mémoire non volatile (98) pour stocker des paramètres d'amplificateur optique et
    - des moyens de commande pour modifier les paramètres d'amplificateur optique stockés précédemment dans ladite mémoire non volatile (98),
    caractérisé en ce que
    les moyens de commande comprennent un commutateur manuel (100) pouvant être utilisé pour stocker les nouveaux paramètres d'arrêt de l'amplificateur optique dans ladite mémoire non volatile (98).
  2. Système selon la revendication 1, caractérisé en ce que les nouveaux paramètres d'arrêt de l'amplificateur optique sont seulement stockés dans ladite mémoire non volatile (98) en actionnant ledit commutateur manuel (100).
  3. Système selon la revendication 1, caractérisé en ce que le système comprend en plus:
    - des registres d'entrée (90, 92, 94) pour stocker des nouveaux paramètres de l'amplificateur optique avant de stocker ces paramètres dans ladite mémoire non volatile (98) ;
    - un comparateur (110) pour comparer les nouveaux paramètres d'arrêt de l'amplificateur optique stockés dans les registres d'entrée (90, 92, 94) avec les paramètres de l'amplificateur optique stockés précédemment.
  4. Système selon la revendication 1, caractérisé en ce que l'entrée d'arrêt de sécurité est reliée à un contrôleur d'arrét/redémarrage (82) qui comprend :
    - des registres d'entrée (90, 92, 94) pour stocker des nouveaux paramètres de l'amplificateur optique avant de stocker ces paramètres dans ladite mémoire non volatile (98) ;
    - des registres de sortie (104, 106, 108) pour délivrer à l'amplificateur optique (34) les paramètres d'arrêt stockés dans la mémoire non volatile et
    - un comparateur (110) pour comparer les nouveaux paramètres d'arrêt de l'amplificateur optique stockés dans les registres d'entrée (90, 92, 94) avec les paramètres de l'amplificateur optique stockés précédemment tels qu'ils sont stockés dans les registres de sortie (104, 106, 108).
  5. Système selon la revendication 3 ou 4, caractérisé en ce que le système comprend en plus un indicateur (112) pour indiquer un défaut de concordance entre les nouveaux paramètres d'arrêt de l'amplificateur optique stockés dans les registres d'entrée (90, 92, 94) et les paramètres de l'amplificateur optique stockés précédemment.
EP01125202A 2000-12-01 2001-10-24 Dispositif d'arret de sécurité configurable d'un amplificateur optique utilisant une mémoire non volatile Expired - Lifetime EP1211825B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US727565 2000-12-01
US09/727,565 US6473224B2 (en) 2000-12-01 2000-12-01 Configurable safety shutdown for an optical amplifier using non-volatile storage

Publications (3)

Publication Number Publication Date
EP1211825A2 EP1211825A2 (fr) 2002-06-05
EP1211825A3 EP1211825A3 (fr) 2003-10-01
EP1211825B1 true EP1211825B1 (fr) 2008-01-23

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US (1) US6473224B2 (fr)
EP (1) EP1211825B1 (fr)
AT (1) ATE385085T1 (fr)
DE (1) DE60132541D1 (fr)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7302186B2 (en) 2001-02-05 2007-11-27 Finisar Corporation Optical transceiver and host adapter with memory mapped monitoring circuitry
US7346278B2 (en) * 2001-02-05 2008-03-18 Finisar Corporation Analog to digital signal conditioning in optoelectronic transceivers
US7149430B2 (en) * 2001-02-05 2006-12-12 Finsiar Corporation Optoelectronic transceiver having dual access to onboard diagnostics
US20040197101A1 (en) * 2001-02-05 2004-10-07 Sasser Gary D. Optical transceiver module with host accessible on-board diagnostics
US7079775B2 (en) 2001-02-05 2006-07-18 Finisar Corporation Integrated memory mapped controller circuit for fiber optics transceiver
US6975642B2 (en) 2001-09-17 2005-12-13 Finisar Corporation Optoelectronic device capable of participating in in-band traffic
US6862302B2 (en) * 2002-02-12 2005-03-01 Finisar Corporation Maintaining desirable performance of optical emitters over temperature variations
US7561855B2 (en) 2002-06-25 2009-07-14 Finisar Corporation Transceiver module and integrated circuit with clock and data recovery clock diplexing
US7664401B2 (en) 2002-06-25 2010-02-16 Finisar Corporation Apparatus, system and methods for modifying operating characteristics of optoelectronic devices
US7809275B2 (en) * 2002-06-25 2010-10-05 Finisar Corporation XFP transceiver with 8.5G CDR bypass
US7437079B1 (en) 2002-06-25 2008-10-14 Finisar Corporation Automatic selection of data rate for optoelectronic devices
US7486894B2 (en) 2002-06-25 2009-02-03 Finisar Corporation Transceiver module and integrated circuit with dual eye openers
US7477847B2 (en) 2002-09-13 2009-01-13 Finisar Corporation Optical and electrical channel feedback in optical transceiver module
US7230961B2 (en) 2002-11-08 2007-06-12 Finisar Corporation Temperature and jitter compensation controller circuit and method for fiber optics device
US7317743B2 (en) * 2002-11-08 2008-01-08 Finisar Corporation Temperature and jitter compensation controller circuit and method for fiber optics device
US7426586B2 (en) * 2003-12-15 2008-09-16 Finisar Corporation Configurable input/output terminals
US7630631B2 (en) * 2004-04-14 2009-12-08 Finisar Corporation Out-of-band data communication between network transceivers
US8024055B1 (en) 2004-05-15 2011-09-20 Sonos, Inc. Method and system for controlling amplifiers
US7447438B2 (en) * 2004-07-02 2008-11-04 Finisar Corporation Calibration of digital diagnostics information in an optical transceiver prior to reporting to host
US8639122B2 (en) * 2004-07-02 2014-01-28 Finisar Corporation Filtering digital diagnostics information in an optical transceiver prior to reporting to host
US7504610B2 (en) * 2004-09-03 2009-03-17 Mindspeed Technologies, Inc. Optical modulation amplitude compensation system having a laser driver with modulation control signals
US7532820B2 (en) 2004-10-29 2009-05-12 Finisar Corporation Systems and methods for providing diagnostic information using EDC transceivers
JP4644571B2 (ja) * 2005-09-08 2011-03-02 富士通株式会社 光伝送装置、光レベル制御方法および光レベル制御プログラム
US8750341B2 (en) * 2008-01-04 2014-06-10 Mindspeed Technologies, Inc. Method and apparatus for reducing optical signal speckle
CN102318338A (zh) 2008-03-31 2012-01-11 曼德斯必德技术公司 便携式lcos/lcd/dlp投影系统中的功率耗散的减少
US8159956B2 (en) 2008-07-01 2012-04-17 Finisar Corporation Diagnostics for serial communication busses
US8643296B2 (en) 2010-11-22 2014-02-04 Mindspeed Technologies, Inc. Color mixing and desaturation with reduced number of converters
US9107245B2 (en) 2011-06-09 2015-08-11 Mindspeed Technologies, Inc. High accuracy, high dynamic range LED/laser driver
US9225307B2 (en) 2012-06-28 2015-12-29 Sonos, Inc. Modification of audio responsive to proximity detection
US9385606B2 (en) 2012-12-03 2016-07-05 M/A-Com Technology Solutions Holdings, Inc. Automatic buck/boost mode selection system for DC-DC converter
US9285886B2 (en) 2013-06-24 2016-03-15 Sonos, Inc. Intelligent amplifier activation
US9244516B2 (en) 2013-09-30 2016-01-26 Sonos, Inc. Media playback system using standby mode in a mesh network
US10097908B2 (en) 2014-12-31 2018-10-09 Macom Technology Solutions Holdings, Inc. DC-coupled laser driver with AC-coupled termination element
US10263573B2 (en) 2016-08-30 2019-04-16 Macom Technology Solutions Holdings, Inc. Driver with distributed architecture
US10630052B2 (en) 2017-10-04 2020-04-21 Macom Technology Solutions Holdings, Inc. Efficiency improved driver for laser diode in optical communication
US10439726B1 (en) 2018-11-01 2019-10-08 Cisco Technology, Inc. Bi-directional temperature controlled optical transceiver
US11005573B2 (en) 2018-11-20 2021-05-11 Macom Technology Solutions Holdings, Inc. Optic signal receiver with dynamic control
US11658630B2 (en) 2020-12-04 2023-05-23 Macom Technology Solutions Holdings, Inc. Single servo loop controlling an automatic gain control and current sourcing mechanism
US11777609B2 (en) 2022-01-27 2023-10-03 Cisco Technology, Inc. Optical transceiver misconnection discovery

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1247844B (it) * 1991-03-29 1995-01-02 Pirelli Cavi S P A Dir Proprie Linea di telecomunicazione a fibre ottiche con amplificatori ottici, dotata di mezzi di protezione in grado di interrompere l'emissione luminosa in tutta la linea in presenza di un'interruzione della fibra ottica e di riattivarla automaticamente al ripristino della sua continuita'
IT1247845B (it) * 1991-03-29 1995-01-02 Pirelli Cavi Spa Linea di telecomunicazione a fibre ottiche con dispositivo di protezione per amplificatori ottici
EP0519712A3 (en) * 1991-06-18 1993-03-31 Canon Kabushiki Kaisha Bus-type communication network
JP3320452B2 (ja) * 1992-07-15 2002-09-03 沖電気工業株式会社 光中継器の監視制御方式
JPH0816761B2 (ja) * 1993-04-13 1996-02-21 日本電気株式会社 光増幅器制御回路
DE4321856A1 (de) * 1993-07-01 1995-01-12 Sel Alcatel Ag Faseroptischer Verstärker mit einer Vorrichtung zur Überwachung der Pump- und Eingangsleistung
JPH0897773A (ja) * 1994-09-27 1996-04-12 Fujitsu Ltd 光信号伝送装置
JP3531761B2 (ja) * 1994-10-14 2004-05-31 安藤電気株式会社 光増幅器雑音指数測定方法および装置
JP2570639B2 (ja) * 1994-12-02 1997-01-08 日本電気株式会社 光送信器
US5563731A (en) * 1995-02-22 1996-10-08 Nec Corporation Monitor control signal receiving apparatus for optical fiber amplifier
US5539570A (en) * 1995-03-21 1996-07-23 Nec Corporation Monitoring state of optical elements in an optical amplifier
JP2687933B2 (ja) * 1995-06-09 1997-12-08 日本電気株式会社 光直接増幅器
CA2172873C (fr) * 1996-03-28 2002-03-12 Kim Byron Roberts Methode pour detecter les defaillances dans les amplificateurs optiques
JPH10163971A (ja) * 1996-11-25 1998-06-19 Fujitsu Ltd 光信号の波長を制御するための方法、装置及びシステム
US6344915B1 (en) * 1997-06-20 2002-02-05 Ciena Corporation System and method for shutting off an optical energy source in a communication system having optical amplifiers
US6317255B1 (en) * 1998-04-28 2001-11-13 Lucent Technologies Inc. Method and apparatus for controlling optical signal power in response to faults in an optical fiber path
WO2000001081A1 (fr) * 1998-06-26 2000-01-06 Sumitomo Electric Industries, Ltd. Systeme de relais d'amplification optique

Also Published As

Publication number Publication date
ATE385085T1 (de) 2008-02-15
EP1211825A3 (fr) 2003-10-01
EP1211825A2 (fr) 2002-06-05
US20020101651A1 (en) 2002-08-01
US6473224B2 (en) 2002-10-29
DE60132541D1 (de) 2008-03-13

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